1.	Use doubles to add.
		4 + 4 =
		A.	6	B.	7
		C.	5	D.	8
		Hint
	2.	Use doubles to add.
		5 + 5 =
		A.	8	B.	9
		C.	10	D.	7
		Hint
	3.	Use doubles to subtract.
		10 − 5 =
		A.	6	B.	2
		C.	4	D.	5
		Hint
	4.	Use doubles to subtract.
		12 − 6 =
		A.	6	B.	8
		C.	5	D.	7
		Hint